Q. 1. When the passenger m oving in a bus , the road side trees appear to b e moving ---------------------------------- (a) Back ward (b)For ward |
Q. 2. In uniform motion the object covers ------------ (a) equel distance (b) un equal distance |
Q. 3. Where objects cover un equal distances in equal interval of time then the motion is called ---------------- (a) uniform motion (b) non uniform motion |
Q. 4. The average speed = =A car accelerate = (a) Total time taken /total distance traveled (b) Total distance traveled/total time taken |
Q. 5. v = (a) t/s (b) s/t |
Q. 6. An object travels 16m in 4sec and another 16 m in 2 sec. what is the average speed of the object----------- (a) 5.33 ms-1 (b) 5. 34 ms-1 |
Q. 7. If we specify , its direction of motion along with its speed , the quantity that specifies with the aspects is called------------- (a) velocity (b) motion |
Q. 8. Automobiles are fitted with a device that show the distance traveled . such a device is known ---------- (a) odometer (b) Speedo meter |
Q. 9. The velocity of an object can be -------------- (a) non uniform or variable (b) uniform or variable |
Q. 10. Average velocity = (a) initial velocity + final velocity/ 2 (b) initial velocity + final velocity/1 |
Q. 11. Average velocity = (a) placement/ total time taken (b) Displacement/ total time taken |
Q. 12. Acceleration = (a) change in velocity/ time taken (b) change in motion / time |
Q. 13. S = (a) ut + 1/2at2 (b) ut + 1 at2 |
Q. 14. A car accelerate uniformly from 18 km h-1 to 36 km h-1 in 5 sec . calculate the acceleration------------- (a) 1ms-2(b) 1 ms-3 |
Q. 15. A train starting from rest attaind a velocity of 72 km h-1 in 5 minutes . Assuming that the acceleration is uniform. Find the distance traveled by the train for attaing this velocity --------------------------------- (a) 2km (b) 5 km |
NCERT Activity Chapter 02 Acid Bases and Salt Class 10 Chemistry Activity 2.1 Indicator Acid Base Red litmus No Change Blue Blue Litmus Red No change Phenolphthalein Colourless Pink Methyl Orange Pink Yellow Indictors are substance which change colour in acidic or basic media. Activity 2.2 There are some substances whose odour changes in in acidic or basic media. These are called olfactory indicators. Like onion vanilla, onion and clove. These changes smell in basic solution. Activity 2.3 Take about 5 mL of dilute sulphuric acid in a test tube and add few pieces of zinc granules to it. => You will observe bubbles of hydrogen gas on the surface of zinc granules. Zn + H2SO4 --> ZnSO4 + H2 => Pass the Hydrogen gas through the soap solution. Bubbles formed in the soap solution as Hydrogen gas it does not get dissolved in it
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